<div class="container" style=" height:500px; width: 70%; margin-left: 15%; ">
  <div class="container1" style="height:500px;background-color:#EBF3EC;">
    
        <div class="tuongtac" style="float:left; width:58%; background-color: #fff;height:450px;margin: 20px">
            
        </div>
        <div class="khoangtrang" style="float:left; width:0%;height:420px;">
            
        </div>
      
        <div class="slide_show" style="float:left; width:35%;height:450px; background-color: #f9f9f9;margin-top: 20px">

        </div>
            
    </div>
</div>
